Transmission does not shift past third gear

2007 CHEVROLET LUMINA
250,000 MILES • 3.6L • 6 CYL • 2WD • AUTOMATIC
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FKHAN77
  • MEMBER
  • 1 POST
Hi, My name is Feroz and i am from Dubai, UAE and i own the car listed above.

When i drive the automatic gear is not changing after third gear. i think and i can see the RPM meter is going high if i increase the speed.

The gear oil was changed 50,000 kilometers before, so can you please advise what should be the problem?

Do i just need to change the gear oil and filter?

When i checked with a technician they say if you change the gear oil it should be fine and need to reset through computer system or do overhauling.

Regards,
Feroz
Feb 22, 2019 at 2:25 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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STRAILER
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 54,176 POSTS
Hi Feroz from Dubai,

Is this car OBD2? if so lets run the codes to see what comes up because you may have a turbine speed sensor that has gone out. Here is a guide to get us started and the location of the sensor in the diagrams below. Also a service for the transmission never hurts. here is a guide for that as well:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

and

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission


Check out the diagrams (below). Please let us know what you find.


Image (Click to enlarge)
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Feb 23, 2019 at 1:15 PM
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